Method for making prepared shingles



June 27, 1933. D. A. CUMFER 5.

METHOD FOR MAKING PREPARED SHINGLES Original Filed 001:. 25, 1926- 5Sheets-Sheet 1 June 27, 1933. D. A. CUMFER METHOD FOR MAKING PREPAREDSHINGLES Original Filed Oct. 25. 1926 5 Sheets-Sheet 2 DomldA 6:011:11?

I i L n/ I Quota! June, 27, 1933. D. A. CUMFER 1,916,095

METHOD FOR MAKING PREPARED SHINGLES Original Filed Oct. 25. 1926 ssheets-sheet .3

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June 27, 1933. D. A. cUMF ER 1,916,095

METHOD FOR MAKING PREPARED SHINGLES Original Filed Oct. 25. 1926 5Sheets-Sheet 4 YELLOW CYLINDER RED CYLINDER GREEN CYLINDER sSheets-Sheet 5 gwwmtoz Jame 27, 1933. o. A. CUMFER I METHOD FOR MAKINGPREPARED SH INGL Original Filed Oct. 25, 1926 laborious one.

Patented June 27, 1933 UNIT STATES PATENT FEEQE DONALD A. CUMFER, OFRUTHERFORD, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN- MENTS,"TO THE PATENTAND LICENSING CORPORATION, 015 BOSTON, MASSACHU- SETTS, A CORPORATION OFMASSACHUSETTS METHOD FOR MAKING PREPARED SHINGLES Application filedOctober 25, 1926, Serial No. 144,128. Renewed December 13, 1927.

The invention relates to a process and apparatusv for manufacturingmineral coated prepared roofin Prepared roo ng of this general type hasbeen extensively used, but because of its dull or monotonous appearance,its use has been more or less confined to inexpensive structures orbuildings. This restricted use, however, cannot be attributed to thequality of the roofing, but solely to the fiat unvarying and monotonousappearance which has not appealed to the eyes of that portion of thepurchasing public who desire a roofing structure presenting a mostpleasing and ornamental effect so as to be appropriate for use withbuilding structures of the more expensive type.

Many efforts have been made to overcome the foregoing object ons withoutcomplete success. It has been proposed to manufacture what are commonlyknown as multicolor shingles. Under present conditions, such shinglesare manufactured by amachine having a partitioned bin for the mineralmatter, the partitions in the bin substantially coinciding with thenotches in the shingle. In this practice, on a single Width machine,where there are three tabs to the strip, each hopper must be filled withthree differently mixed charges of slate. The slate to go into eachhopper must, therefore, be mixed by hand, before it is placed in thehopper, this operation naturally being a very In running the roofingwith these three shades, the result is a sheet in which there are threebands or stripes extending lengthwise of the web. The web is cut at theend of the machine into cross cut strips, producing thereby a strip withthree difierently colored tabs. It will be readily appreciated that ifthese strips with only three colors were put on a roof of any substantial area, the said three colors would repeat in a mathematicalsequence, and the result is that the roof gives a checkerboardappearance which is decidedly unsightly. In an effort to overcome this,it has been proposed to run four different or independent stocks in amanner similar to the above described, in each stock of which theshingle tabs are given different colors, or have the colors placed indifferent sequence by the proper pre-mixing of mineral matter appliedthereto. It has been necessary to run at least four of such stocks, andto then combine them in a regular order so that a finished package whichhave an irregular sequence of all four of such stocks. It should beborne in mind that in such a practice these four difierent stocks, ofwhich there are three tabs to each strip, or twelve shingle tabs to theassembly, will have at least six or more colors. it is not a simplematter to produce a desirable color blend effect with such tabs becauseof the necessity of selecting proper color blends, and also thenecessity of arranging the sequence of colors that is necessary to avoidmathematical repetition in colors on the tabs. Such an assemblyoperation has been exceedingly expensive, and even when carried out toperfection, it does not give the roof the artistic appearance it shouldhave.

It is an object of this invention to provide a process and apparatusovercoming the foregoing objections by producing mineral coated shinglestrips having predetermined areas, zones or tabs thereof coated withpredetermined blended minerals. in regulated ratios whereby the roofingat all times presents a highly artistic and ornamental appearance. Inthis process, the minerals of different colors, are withdrawn fromsuitable supplies and combined in measured predetermined quantities toform charges that are thereafter, when in a thoroughly mixed condition,applied to predetermined areas of the roofing material. These successivecharges or color combinations vary so that the mineral on one tab orarea of the roofing strip is of a shade or appearance properlycontrasting with the shade or appearance of the mineral on an adjacenttab.

1' have found that the roofing can be given a most artistic and pleasingappearance when a uniform quantity of mineral or grit is applied to eachpredetermined area or tab of the strip. The mineral applied to each tabis preferably composed of a series of differently colored grits, and toobtain the artistic appearance referred to, the ratio of one coloredmineral or grit relative to the ratio of a proper adjustment of saidfeed rolls so as another must be definitely controlled and varied togive the adjacent tabs of a strip contrasting shades properlyblendingwith one another when the roofing is laid. In forming the successivecharges of mineral from the variously colored grits, I mix determinedand measured quantities of various solid colored minerals, such as red,green, and ellow, in definite varying proportions, whic charges aresuccessively formed and progressively applied to predetermined areas ofthe roofing material.

It is a further object of the invention to provide a process andapparatus by means of which a wide range in variations in the colorcombinations may be obtained with a minimum adjustment of the parts ofthe apparatus. That is to say, the process is one in which the shades orblends of the mineral charges may with case be varied by changing thequantity of one or more minerals entering said charge to another, whichnaturally changes the shade of the charge which is to be applied to thetab of a shingle strip.

While the process is particularly useful in the production of a roofinghaving predetermined areas or tabs covered with suitable blendedminerals to give the shades desired, and to distinguish from the dull,monotonous efi'ect obtained by the use of solid colors, it will, ofcourse, be understood that it is entirely within the province of theoperator in carrying out this process and in operating the apparatusto/apply charges of blended minerals of predetermined colors numeroustabs of the roofing material, and to also coverother tabs with mineralof a solid color should such a color combination be found desirable.

It is a further object of this invention to provide an improvedapparatus for measurmg the relative quantities of differently coloredminerals forming each charge and in successively applying such chargesto predetermined areas of the roofing material. This is accomplished byutilizing in the apparatus a plurality of mineral feed rollers having inthe periphery thereof pockets of a uniform length and width but varyingin depth, as well asblank peripheral surfaces.

. These feed rolls are adjustably mounted so that the pockets or blanksurfaces of one feed roll may be adjusted relative to the others tocause the application of predetermined quantities of the variouslycolored grits to a determined zone on a carrier, which charges aresuccessively formed and of a predetermined shade when mixed, andthereafter are deposited on selected zones or areas of the roofingmaterial in the desired order. be appreciated that the feed rolls allrotate in unison and that the relative quantity of one grit with respectto another that is to form a given charge, may be freely varied bypasses.

It will.

.area of the carrier, forming a charge giving the selected shade. I

The apparatus furthermore embodies othor improved mechanical devices andcombinations which are novel and which will be more fully hereinafterdescribed.

In the drawings.

Fig. 1 represents a side elevation of color machine showing its relativelocation in a roofing machine.

Fig. 2 represents a plan view of same.

Fig. 3 represents afront elevation of same.v

Fig. 4 represents a detail of one of the slate feeding cylinders.

Figs. 4a, 4b and 40, represent a diagraminatical development of slatefeeding cylinders.

Fig. 5 represents a cross section through a slate feeding cylinder; and,I

Fig. 6 represents a diagrammatical section of roofing showing relativeamounts of slate on each area.

Referring now more particularly to the drawings, wherein like referencecharacters indicate corresponding parts, the numeral 1 designates thebase of the apparatus having supporting legs of any convenient type.Near its upper end there is provided a pair of separated rolls 2 and 3.The roll 3 is preferably mounted for rotation in the frame of themachine and is not adjustable. The roll 2, however, is adjustablyreceived in slideways 4 in each side of the machine, the bearing shaftof this roll being supported at each end by blocks 5 which are adjustedby the action of the adjusting screws 6.

Around the rolls 2 and 3 a collector belt 7 This belt is slowly rotatedin the direction of the arrow upon a driving operation of the roll 2.Obviously, the rolls are adjustedso as to maintain the belt taut.

This collecting belt or carrier will be more definitely referred tohereinafter.

Disposed on the frame of the machine and above the carrier or collectingbelt are a series of hoppers 8, 9, and 10 which extend transverselyacross the machine and are suitably supported by the legs thereof. Theseelongated hoppers may each have aseries of partitions 11 as shown inFigure 3 to, in effect, divide each hopper into a series of sections.The hoppers 8, 9, and 10 receive batch supplies of difl'erently coloredmineral. For instance, the hopper 8 may receive a supply of yellow gritor mineral, the hopper 9 a supply of red. and the hopper 10. a supply ofgreen. These are known as solid colors, it being, of course, apparentthat other colored grits can be used, depending upon retaoas thecharacter of the roofing strip that is to be produced.

As has been hereinbefore pointed out, it is one of the objects of thisinvention to provide a process and apparatus by which roofing materialmay be produced which has various areas or tabs thereof covered withsuitably blended grit or mineral matter so as to give the roofing stripa pleasing and ornamental appearance to and destroy the dull andmonotonous appearance so general in prepared roofing. in order to applyto predetermined areas or tabs of the roofing strip differently coloredminerals in regulated or determined relative quantities so as toproperly shade the resultant composite charge which is to be applied toa given area of the roofing material, feed rolls 12, 13, and 1d areprovided, one being disposed at the bottom of each mineral hopper. Oneof these feed rolls is shown in detail in Fig. 4. Inasmuch as each feedroll is of the same specific construction, a description of one willsuliice for all. Each feed roll is adjustably mounted on a driving shaft15, being retained in its adjusted position by a fastening bolt or screw15 that passes transversely through a portion of the feed roll andengages the driving shaft 15. By means of this adjustment any feed rollmay be turned to a determined position on its shaft and retained in suchadjusted position. Each feed roll tightly fits the bottom of its feedhopper, so that no material can be delivered from a hopper except by therotation of its feed roll. For the purpose of illustrating thisinvention, each feed .roll is provided in its periphery with a series ofpockets 16, 17, and 18 respectively, all of dilferent depths andtherefore of different capacities. The periphery of each roll also haspredetermined blank surfaces. In the showing, three series of thepockets referred to are disclosed, but, of course, this number can beamplified. It will be understood that the depth of the various pocketsin each series of the different feed rolls vary, as will more fully behereinafter pointed out, and it will further be appreciated that theformation of these pockets in a given roller are not uniform across theroll, although having substantially the same width and length, but varybeneath various of the partitions 11 for the purpose of applying to thecarrier belt on adjacent zones thereof different quantities of grit.Each, roll is, of course, removably connected with its supporting shaftand various rolls are available having pockets therein of different andvarying depth so that the appropriate roll may be selected, this, ofcourse, depending upon the color combination desired. Each hoppercarries a semi-circular guard 20 which extends around the lower portionof the feed roll for the purpose of preventing the discharge of thematerial contained in any pocket until such pocket passes beyond. theend of the guard, at which time the contained material is readilydeposited on the advancing carrier belt traveling beneath the pocket.

is before stated, each feed roller is of the same construction with theexception, of course, that the pockets arranged therein may, andgenerally are, of different capacities or depth in order that theselected quantity of is all a matter of timing, the operator afterhaving worked out a pattern, then merely selects feed rolls having theproper formed pockets and adjusts these rolls on their supporting shafts'15 by the adjusting and retaining pin 15 so that one roll is properlycoordinated with another roll whereby the one, two or more rolls willdeposit given quantities of differently colored grit on a common-zone ofthe carrier. 4

All of the feed rolls are adjusted to be driven in unison. The carrierbelt operating beneath these rolls is alsodriven in synchronism with therolls. Various forms or driving mechanism may be employed, but for thepurpose of illustrating this invention, ll have shown an aligned shaft21 carrying a gear 22 meshing with a gear 23 on a shaft 24. The shaft 2has a sprocketwheel 25 thereon around which a chain 28 passes. Thischain also engages a sprocket 29 on a transverse shaft carrying a gear30 meshing with a gear 31 on the carrier feed roll 3. A. clutchmechanism 26 also connects the shaft 24 with a gear 27 that in turnengages a gear 27 on the feed roll for the asphalt coated fabricmaterial'to which the mineral matter is to be applied.

To operaie the metering or mineral feeding rolls 12, 13, and 14c, Iprovide at one end of the roll 3 a sprocket 22, around which a drivechain 23 passes, this drive chain traveling around a sprocket 24:attached to the shaft of the metering roll 12. This metering roll 12, atits opposite end, also carries a gear 30 meshing with an interposed gear31' which in turn meshes wilh a gear 32 mounted on the feed roll 13,while a similar gear 83 transmits the power from the feed roll 13 to agear 35 on the feed roll 14. In this manner, the feed rolls'all operatein the same direction, and, of course, in synchronism. The widh andlength of the slots in the metering rolls, 12, 13, and 14c,are'identical. The speed at which these rolls is driven relative to thespeed of the carrier belt is such that as the metering roll advances awidth of one inch, the carrier belt advances nine inches. As the carrierbelt advances nine inches, the roofing sheet or material passing beneath(his belt advances nine inches, which is the determined area to becovered. These relative movements can, of course, all be varieddepending upon the type of shingle that is to be manufactured.

The carrier belt 2 passes beneath the feed rolls and the grit or mineralis applied to this belt in predetermined charges covering given areas ofthe belt. It will be appreciated, of course, that the adjacent zones orA strip of fibrous material such as commonly used in the manufacture ofprepared roofing runs beneath the baflies 32. This strip is representedby the reference character 33. It is impregnated and coated with anadhesive material such as asphalt, bitumen, etc., and onto this adhesivesurface the charges of mineral matter are deposited. If, for example,the pockets in the roll are say, one inch wide, the relative speeds areso controlled that when the peripheral travel of a metering roll is oneinch, the carrier belt will have traveled nine inches, and the roofingsheet will have traveled nine inches. In this way, regardless of thespeed of the sheet, the metering andv deposition of slate, in accordancewith a predetermined color blend pattern, may-be. accomplished. Thespeed of the varioiis parts of the apparatus and the movement of theroofing strip 31 are so timed that a charge of a determined area on thecarrier belt 2 will cover a predetermined zone of the roofing strip, orin common practice will cover a tab which may be 12" X 9" in area; Themineral matter so applied is of the desired shade by reason of the factthat it is composed of determined quantities of the differently coloredminerals from the hoppers 8, 9 and 10. The roofing strip, afterreceiving this mineral, passes on around a suitable sanding unitembodying the rolls 34 and 34, and thence to the suitable severingapparatus where the sheet is cut into strips, each strip preferablyembodyin g three tabs. Any loose grit is picked up at the sanding unitand deposited into the hop per 35 from where suchgrit is collected andmay be again used in any approved manner.

As will be clearly appreciated, the process herein involved is one bywhich roofing material is produced wherein the various tabs thereof arecoated with grit or mineral matter of different colors in predeterminedrelative quantities. It will be furthermore understood that the adjacenttabs, for instance, of a roofing strip, have difierent shades so as todestroy any dull or monotonous efiect. In Fig. 6. I haveshowndiagrammatically the surface of a section of a roofing stripproduced by this operation. In this diagram the tabs A, A, A and A ofcourse, all have received grit charges that have been formed and placedon the carrier belt 2 by the action of the feed rolls between a pair ofthe baffles 11. Likewise, the tabs B, B, B and 13, all have receivedmineral charges that were deposited on the carrier belt by pockets inthe feed rolls disposed between an adjacent pair of said baflies 11 andthe same applies as to the tabs C to C D to D E to E and F to F In thisembodiment of the invention, the roofing sheet is of sufficient width toprovide six tabs thereon or two strips, as each strip contains threetabs when the sheet is cut by severing mechanism known in the art. Thearrows 36 indicate the direction of movement of the sheet through themachine. It is, of course, understood that each tab or predeterminedarea of the roofing strip receives a certain definite minimum quantityof mineral matter, this being a matter of calculation, to assure theadequate covering of the surface of the tab. All of the tabs mustreceive this total amount of grit or mineral matter, but the proportionsof one colored mineral relative to another applied to the adjacent tabswill vary. In the diagrammatic showing, the tab A has been covered witha. charge of grit, 3/ of which is green in color and yellow. Assumingthat the total depth of a pocket formed in one of the feed rolls must be.333, to provide the amount of grit necessary to cover an area of say12" wide x 9" long, the rolls will have been so timed and adjusted thatthe green roll 14 will have a pocket of .199", depositing this quantityof green slate or mineral on an area or zone of the carrier belt thathas already received from a suitably sized pocket in the yellow feedroll 12, .132 of yellow grit or mineral matter. The t-ab'marked A in thediagrammatic view has received a charge of mineral matter containing agreen colored mineral and a red colored mineral. 'This means that theoperator has adjusted his rolls so that at the time a given zone or areaof the carrier belt is to receive this charge, a pocket in the redroller 13 of a capacity of .166" deposits its charge on'this carrier,while at the time this charge reaches the green roll 14 a pocket inthisroll of 0.166" passes from beneath the guard 20 and drops thismineral on the zone aeraoee that had received the red charge. During thetime that this zone of the carrier or belt passed beneath the yellowfeed roll .12, one of the blank or unbroken spaces 19 of this feed rollis passing around the guard 20, prohibiting the application of any ofthe yellow grit to the zone or area of the carrier that received thecharge subsequently applied to the tab A The same operation occurs inthe measuring of the various charges to be applied to all of the othertabs of the roofing sheet. The feeding rollers are all adjusted after acolor combination has been selected by the manufacturer so that theroofing strip will receive the Various charges of dilferently coloredmineral grit to be applied to predetermined zones or tabs ofthis sheetso that the adjacent tabs or zones are properly shaded.

Fig. 6 diagrammatically discloses the action of the feeding rolls, andrepresents the dimensions of the successive pockets of the three feedrolls 12, 13, and 14, entirely across each roll to produce a roofingsheet wherein the tabs receive charges containing ratios of differentlycolored minerals as shown in Fig. 5. In this chart, A represents themineral matter fed by the green and yellow rolls to cover the tabdesignated by reference character A in Fig. 5. A likewise represents thecapacity of the pocket feeding the green and yellow grit or mineralmatter to form the charge covering the tab A The tab A, as shown in Fig.5, has received a mineral charge containing certain quantities ofyellow, green, and red grit. By referring to the diagrammatic chart inFig. 6, it will be seen that the feed rolls 12, 13, and 14 all havepockets of .111 which deposit the desired quantity of grit insupet-imposed layers on a given zone of the carrier belt during theadvancing of this zone through the machine. As before stated, when acolor combination has been designed which has a pleasing appearance,then the feed rolls are selected and adjusted so that the pockets formedtherein are of sufficient depth to produce the charges desired, and areso timed as to deposit the contents of each pocket on the proper area orzone of the carrier belt as it is advancing through the machine. v

Fig. 6 furthermore contains reference characters B to B inclusive to Fto F inclusive, and ,such reference characters correspond with thereference characters applied to the tabs shown in Fig. 6. For instance,to produce the charge of red and yellow for the tab B, the feed roller12 for the hopperv 8 has a pocket of .111" depth discharging itscontents at a predetermined time to a determined zone or area of thecarrier belt, which belt then advances beneath the roll 13 at which timea pocket in this roll of .222 discharges its contents of red mineralmatter on 55' this zone, the carrier belt then advancing around thedrive roll 3, but receives no mineral matter from the feed roll 14,inasmuch as an unbroken portion of this feed roll is traveling aroundtheguard 20 when this predetermined area of the carrier belt passesbeneath this roll. It will be understood that in the illustration hereingiven, it has been assumed that a pocket having a total depth of .333 isnecessary to apply the proper amount of grit to cover one of the tabs,but, of course,

this selection has been made merely for the purpose of illustrating thisinvention, and can be changed at will.

It will also be appreciated that the color combinations, as hereinshown, are subject to change at any time. Regardless of the colorcombinations used, it will be apparent that charges containing regulatedquantities of one colored grit relative to another can be successivelyformed from batch supplies of differently colored minerals andthereafter applied when in a thoroughly intermixed condition todetermined tabs or zones ofa roofing sheet so as to give such tabs aproper and variable shade, destroying the dull and monotonousappearance, incident to the use of solid colors. The relative quantitiesof the differently colored grits forming each I charge are subject toinstant change, permitpockets in the various rolls will vary in depth. Ipropose to utilize liners or fillers to be inserted in the variouspockets in the feed rolls by means of which the carrying capacity ofeach pocket can be varied to produce any desired number of colorcombinations. These liners will naturally change the depth of a pocket,and by keeping available a substantial number of liners of variousdepths, a multitude of color combinations can be effected with the useof a minimum number of rollers.

In this specification, I have disclosed metering rolls for measuring thequantities of material deposited on the carrier belt. It will be, ofcourse, understood that it is within the scope of this invention to useany suitable measuring devices by means of which definite quantities ofminerals could be deposited on the carrier belt within certain limits ofaccuracy.

The term mineral employed in the claims is intended to embrace allsurfacing materials for roofings of a granulated or pulverulent typewhich may be employed in ject matter of the claims.

Having thus described my invention,

7 what I claim is:

cent zones thereof with blended grit coatings I of contrasting shades.

2. The method of producing mineralcoated roofing material, whichconsists in discharging from batch supplies differently coloredminerals,in metering the quantity of mineral discharged from each batch toprovide composite charges of such minerals in predetermined ratios andof a total quantity suflicient to cover a determined area of a roofingsheet, in varying the color of such minerals forming the successivecharges to be applied to succeeding zones of the roofing material byvarying the ratio of the grits, in depositing such preformed charges onthe roofing material successively to. cover the adjacent zones thereofwith blended mineral coatings substantially contrasting in shade.

3. A method for producing mineral coated roofingmaterial, which consistsin providing batch supplies of differently colored minerals, indischarging predetermined regulated quantities of such minerals to formsuccessive charges of sufiicient quantities to cover a determined areaof the roofing sheet, in continuously varying the ratio of one coloredmineral relative to the other released from said batch supplies, to formthe succeeding'charges of contrasting shade in applying the successivecharges to succeeding zones of a roofing sheet to form mineral coatedzones thereon with the shade of one zone contrastingwith the shade of anadjacent zone.

4. The method of producing contrasting zoned mineral coated roofingstrips cons sting in covering the tabs of such strips with successivecharges of grits in substantially equal total quantities, said methodbeing characterized by continuously varying the quantity of one coloredgrit relative to another forming the succeeding charges, in applyingsuch charges to the succeeding tabs of the shingle strip concurrentlywith the travel thereof whereby each tab of said strip is coated withdifferently colored grits in redetermined relative quantit escontrastlng with the shade of the grit applied to an adjacent tab.

5: A method of producing mineral coated roofing strips, consisting incontinuously applying to a series of zones of a carrier in substantiallyequal total quantityv differently colored mineral charges inpredetermined measured ratios, in continuously varying the color bychanging the proportion of one mineral relative to the other forming thesucceeding charges applied to the successive zones of the carrier, intransferring such charges from each zone of the carr'er to apredetermined area of the roofing sheet of fibrous material whereby theadjacent areas of the sheet are coatedwith charges of blended mineralsof predetermined relative colors and ratios. with the shade of one areacontrasting with the shade of the adjacent area. 6. A method ofproducing mineral coated roofing material, consisting in applying to acarrier on predetermined areas thereof charges of m neral matter insubstantially equal total quantities, in continuously varying the colorby changing the quantity of one mineral relative to the other formingadjacent charges on said carrier, in mixing the differently coloredminerals forming each charge and in applyng such charges topredetermined zones of a strip of roofing material to coat adjacentzones with mineral coverings presenting contrasting shades.

7. A method of producing mineral coated.

roofing material, comprising applying to a moving carrier differentlycolored minerals in predetermined ratios to produce thereon a series ofcharges with each charge being in suflicient quantity to cover adetermined area of a roofing sheet, in continuously varying the color bychanging the ratio of one grit relative to another forming the adjacentcharges on the carrier, in effecting a mixng ofthe difi'erently coloredminerals torming each charge, and in depositing such chargessuccessively on predetermined areas of an advancing strip of roofingmaterial whereby adjacent coated areas present contrasting shades.

8. Themethod of manufacturing mineral coated roofing materials, wh chconsists in continuously advancing a strip of roofing material through amachine, in depositing on predetermined areas of said continuouslyadvancing strip composite mineral material containing regulated relat vequantities of differently colored minerals. and in continuously varying,in timed relation with the advancement of strip, the composition of thecharges applied to succeeding areas to give such areas contrastingappearances.

9. A method of manufacturing roofing, conssting in advancing a strip ofroofing material, in coating such material with a composite mineralmatter, consisting of regulated predetermined quantities of differentlycolored grits, in continuously changing the composition of such m neralmatter applied to one portion of the strip relative to the compositionapplied to the succeeding portion thereof and in timed relation with theadvancement of the strip, whereby different portions of the strip arecoated with compos te mineral matter presenting contrasting appearances.

10. A step in the method of manufacturing prepared roofing, consistingin applying to predetermined successive areas of the surface of theroofing, composite mineral matter containing relative metered quantitiesof differently colored grits, and in continuously varying thecomposition of such mineral matter applied to one zone of the striprelative to the composition applied to the succeeding area andconcurrently with the travel of the strip, for the purpose described.

11. A method of manufacturing roofing, consisting in withdrawing frombatch supplies of differently colored minerals regulated varyingquantities of certain of such minerals, combining such regulatedquantities of material, substantially as withdrawn, to produce acomposite mixture of a determined shade, in applying such mixture to thesurface of a roofing strip, and in continuously varying the relativequantit'es of differently colored grit applied to an adjacent surfacezone of the roofing strip to provide a surface having zones thereofcontrasting in appearance.

12. A method of manufacturing contrasting zoned, mineral surfacedroofing materials, which comprises forming a charge of a plurality ofmetered surfacing minerals sufiicient to cover a predetermined area of aroofing base, continuously varying the composition of the succeedingcharges, con

currently with the travel of the base and dcpositing such charges onsucceeding predetermined areas of the base.

13. A method of manufacturing contracting zoned roofing materials whichcomprises the steps of combining a plurality of metered surfacingmaterials of a quantity sufficient to cover a predetermined area of aroofing base, and continuously varying, concurrently with the travel ofthe base, the ratio of the surfacing materials to obtain succeedingcharges and depositing such charges on succeeding predetermined areas ofthe base.

14. A method of manufacturing contrasting zoned mineral surfaced roofingmaterials whichcomprises the steps of forming a charge of a plurality ofmetered surfacing minerals, sufficient to cover a predetermined area ofa roofing base, continuously changing the color of the succeedingcharges by varying the ratio of the grits comprising the charge and insuccessively depositing said charges on succeedingly predetermined areasof the base.

15. A method of manufacturing contrasting zoned roofing materials whichcomprises the application of metered quantities of differently coloredsurfacing materials sufit cient to cover a predetermined area of aroofing base, in continuously changing the composition of thesucceeeding charges by metering varying ratios of the surfacingmaterials concurrently with the travel of thebase, and in depositingsaid surfacing materials on succeeding predetermined; areas of the base,whereby one area is strikingly contrasted from the adjacent area.

16. A method of manufacturing roofing consisting in continuouslywithdrawing from batch supplies of differently colored minerals,concurrently with the travel of the sheet, metered quantities of aplurality of such differently colored minerals, continuously combiningsaid metered quantities of differently colored minerals substantially aswithdrawn to produce a plurality of composite mixtures, each of saidmixtures being of a predetermined shade, and in applying said mixturesto adjacent zones on the surface of the roofing sheet.

17. The method of manufacturing roofing, which comprises formingconcurrently with the travel of the sheet a charge composed of apredetermined mixture of differently colored minerals and a secondcharge coniposed of a different predetermined mixture of coloredminerals, and applying said charges to the surface of the sheet to formzones of different shades thereon.

18. A method of manufacturing roofing consisting in continuouslywithdrawing from batch supplies of differently colored minerals,concurrently with the travel of the sheet, metered quantities of thedifferently colored minerals, continuously combining said meteredquantities of minerals substantially as withdrawn to produce a pluralityof differently colored streams of minerals, each of said streams beingcomposed of a composite mixture of a predetermined shade, and applyingsaid streams to the surface of a roofing sheet in adjacent zones.

19. The method of producing cyclical mixtone effects in roofing surfacedwith contrasting granules which comprises intermixing the granules asthey are supplied to a run of the roofing, and in cyclically varyingpropor-' tions.

20. The method of producing mixtone effects in roofing surfaced withcontrasting granules which comprises maintaining bulk feed supplies ofdifferently colored granules,

in discharging as streamsmetered quantities of granules contrasting incolor, in intermixing said granules after withdrawal from the bulksupplies and applying the intermixed granules to a sheet of roofing andin cyclical-. ly varying the proportions of the intermixed granuleswithdrawn from the bulk supplies.

21. A method of producingv Inixtone effects in roofing surfaced withcontrasting granules which comprises wthdrawing contrasting granulesintermittently in metered quantities from bulk feed supplies, inintermixing such metered quantities of contrasting granules afterwithdrawal from the bulk supplies and applying said intermixed granulesto a run 0 roofing and in cyclically varying proportions.

22. The method of producing mixtone effects in roofing surfaced withcontrasting granules which consists in maintaining independent bulksupplies of differently colored granules, in withdrawing in meteredstreams differently colored granules from said storage supplies, and iniutermixing said streams of granules after withdrawal from the bulksupplies to 'be supplied to a run of roofing, and in cyclically varyingthe progortions of differently colored granules withrawn from the bulksupplies.

23. A method of manufacturing mineral, coated roofing materials whichconsists in providing independent bulk supplies of different coloredranules, in forming charges from said sup fiies by withdrawing streamsof differently colored granules in predetermined ratios, in intermixingsuch withdrawn streams after withdrawal to produce a desired shade, andin continuously varying the proportions of the granules withdrawn asstreams from the bulk supplies to form charges of contrasting colors tobe applied to successive zones of the roofing material, and in applyingsuch charges to the roofing material to cover adjacent zones thereofwith intermixed differently colored granules presenting contrastingshades.

24. The method of producing mixtone effects in roofing surfaced withcontrasting granules which consists in maintaining independent bulksupplies of differently colored granules, in releasing determinedquantities of such difierently colored granules from the storagesupplies and in intermixing the granules after their release andapplying the charge thus formed to a run of roofing and in cyclicallyvarying the proportions of the differently colored granules releasedfrom the bulk supplies.

25. The method of producing mixto'ie effects in roofing surfaced withcontrasting granules which comprises maintaining bulk feed supplies ofgranules of different primary colors, in releasing determined meteredquantities of said granules contrasting in color, in intermixing thegranules after their J release from the bulk supply, and as they aresupplied to a run of roofing, and in cyclically varying the proportionsof the released intermixed granules withdrawn from the hulk supplies.

26. The method of producing blended and a varied mixtone effects inroofing surfaced with contrasting granules which comprises maintaininghulk feed supplies of granules ofdifi'erent primary colors, insuccessively releasing predetermined proportions of certain of saidgranules and permitting them to gravitate downwardly after their releasefrom the bulk supplies, in intermixing the released granules on theirway to the roofing andin cyclically varying the proportions of thereleased granules to form successive contrasting charges applied to theroofing.

27. The method of surfacing roofing which comprises the advancing of asheet of roofing material, maintaining a series of bulk supplies forgranules of different primary colors. in releasing predeterminedmeasured quantities of the granules from said sources of supply in timedrelation to the advancement of the roofing strip and in intermixing thewithdrawn granules to form charges applied to the moving roofing sheetand in continuously and cyclically varying the relative proportions ofthe released granules to form successive charges of continuouslycontrastingcolors.

28. The method of producing mixtone effects in roofing surfaced withcontrasting Y granules which consists in maintaining elevated bulksupplies of differently colored granules, in continuously advancing therun of roofing below the outlets of said bulk supplies, in releasing, incyclically varying proportions, said granules from the elevated suppliesin synchronism with the advancement of the run of roofing, effecting themixture of the withdrawn granules to form charges applied to the roofingof continuously varying color combinations.

29. The method of surfacing roofing comprising the steps of advancing aroofing base, separately withdrawing from bulk supplies differentlycolored surfacing materials, intermixing the same and forming a mixtureof definite, determined composition, and applying the mixture thusformed to the advancing roofing base.

' 30. The method of producing mixtone effects in roofing surfaced withcontrasting granules which comprises maintaining bulk feed supplies ofdifferently colored granules, in discharging as streams meteredquantities of granules. contrastin in color, in intermixing saidgranules a ter withdrawal from the bulk supplies to form a compositemixture composed of predetermined composition, and applying the same toa sheet of roofing.

31. The method of producing mixtone effects. in roofingwith contrastinggranules comprising the steps of withdrawing differently coloredgranules from bulk supplies,

thoroughly intermixing said granulesafter withdrawal from the bulksuppliesand forming a charge of predetermined, definite composition, andapplying said charge to an advancing sheet of roofing.

32. The method of producing mixtone efforts in roofing with contrastinggranules comprising the steps of withdrawing differently coloredgranules from bulk supplies, thoroughly intermixing said granules afterwithdrawal from the bulk supplies and forming a charge of predetermined,definite composition, applying said charge to an advancing sheet ofroofing, and in successively changing the composition of the succeedingcharges whereby to create colored areas on the roofing of differentshades.

of the operator, in sub-dividing the roofing base in difierently coloredstrips and arranging the difierently colored strips in bundles,successively, as they are sub-divided from the strip whereby the .stripsmay be laid upon the roof in their consecutive arrangement to producethe pre-conceived design.

34. In the method of producing mixtone effects for use in surfacingroofing, the steps which comprise withdrawing surfacing materials ofdifferent characteristics from bulk supplies and in thoroughlyinteradmixing the same to secure a mixture of predetermined, definitecomposition, and in varying the composition of the mixture to producesubsequent mixtures of diiferent but definite and determinedcompositions.

In testimony whereof I aflix my signature.

DONALD A. CUMFER.

